UE Inter-Frequency Measurement Initiation via Signal Averaging
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Solution Overview
Problem
User Equipment (UE) frequently initiates measurements of neighboring inter-frequency/inter-system cells even when it does not move or moves little, leading to unnecessary power consumption and radiation.
Innovation Solution
A method where the UE obtains multiple signal quality values of the current serving cell and stores those below a threshold until a certain number of values are collected, then calculates a mean signal quality value; if this value exceeds a reference threshold, it initiates measurement of a neighboring inter-frequency/inter-system cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE initiates measurement of neighboring inter-frequency/inter-system cell when Srxlev≤Snon_int rasearch, then cell reselection quality is improved, but power consumption increases unnecessarily when UE is stationary
Solution Approach 1:
The patent applies dynamics by making the measurement initiation threshold adaptive based on UE movement state. When UE is detected to be stationary (through location change detection), a first threshold is used; when UE is moving, a second threshold is applied. This dynamic adjustment allows the system to maintain measurement initiation quality when needed while reducing unnecessary measurements when UE is stationary, thereby resolving the contradiction between cell reselection quality and power consumption.
2Reliability
If UE frequently initiates measurements to ensure connection quality, then connection reliability is improved, but radiation exposure increases
Solution Approach 1:
The patent reduces radiation exposure by dynamically adjusting measurement initiation frequency based on UE movement state. When UE is stationary, the system uses a stricter threshold that prevents unnecessary measurements, thereby reducing radiation. When UE is moving, measurements are initiated more freely to maintain connection quality. This dynamic approach resolves the contradiction between connection reliability and radiation reduction.
3Device complexity
If UE uses a simple threshold comparison for measurement initiation, then device complexity is reduced, but measurement precision deteriorates due to environmental variations
Solution Approach 1:
The patent enhances measurement initiation precision without significantly increasing device complexity by introducing movement state detection and adaptive threshold selection. The system detects whether UE is stationary or moving and selects appropriate thresholds accordingly. This dynamic approach improves measurement precision by accounting for environmental variations while maintaining relatively simple device architecture through standardized detection mechanisms.
Solution Approach 2:
The patent changes the threshold parameter based on UE movement state to improve measurement initiation accuracy. By switching between a first threshold (for stationary UE) and a second threshold (for moving UE), the system adapts to different environmental conditions and UE states, thereby improving measurement precision without requiring complex algorithms.
4Speed
If UE initiates measurement based on instantaneous signal quality, then response speed is improved, but reliability deteriorates due to signal fluctuations
Solution Approach 1:
The patent performs preliminary location change detection and movement state determination before initiating measurement based on signal quality. This preliminary action filters out transient signal fluctuations by considering the UE's movement context, ensuring that measurements are initiated only when genuinely necessary. This approach maintains fast response speed while improving measurement initiation reliability.
Data Source
AI summary
A measurement initiation method for inter-frequency/inter-system cell reselection and UE thereof are described. A signal quality value of a current serving cell is obtained for many times, and a signal quality value smaller than or equal to a threshold of measurement initiation of a neighboring inter-frequency/inter-system cell is stored storing until L signal quality values are obtained; a mean signal quality value is obtained by calculation according to the obtained L signal quality values, and when the mean signal quality value is greater than a signal quality reference threshold, UE initiates the measurement of the neighboring inter-frequency/inter-system cell. By using the method and UE, the problem that UE frequently initiates measurement of a neighboring inter-frequency/inter-system cell even when UE does not move or moves a little can be solved, the power of the UE can be saved, and the radiation produced by the UE on a mobile user can be reduced.